Change / Delete an X11-property on the terminal window.
If text
contains a '=' sets an X11-property on the terminal window named by the part before the first '=' with the contents of the part after the first '=' as value.
Otherwise remove the property with the name text
🛈 enabled by default. 🛈 In insecure mode also supports readback with ESC]3;?ⓈESC\.